Insane Mode On Premises offers significant improvements to migration speed by using the Server Extension for faster file uploads and save time.
To enable the Insane Mode on-premises (2007, 2010, 2013, and 2016), you must follow these steps:
Install the server extension (version 1.8.3 or greater) on your source and destination servers.
If your farm has multiple web front-end servers (WFEs), the extension must be installed on all the WFEs.
Note: You can install it on either the source or destination only and still benefit from the extra speed, but you will achieve even better performance if you install it on both the destination and source servers.
When prompted to select the copy options, toggle the speed to Insane.
Select and Migration.
Select Insane Mode in the Migration Speed section.
Your migration will now run using Insane mode.